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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<span class="sourceLineNo">003</span> * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<span class="sourceLineNo">007</span> * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<span class="sourceLineNo">014</span> * See the License for the specific language governing permissions and<a name="line.14"></a>
<span class="sourceLineNo">015</span> * limitations under the License.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span><a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.commons.net.nntp;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.ArrayList;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>/**<a name="line.22"></a>
<span class="sourceLineNo">023</span> * This is a class that contains the basic state needed for message retrieval and threading.<a name="line.23"></a>
<span class="sourceLineNo">024</span> * With thanks to Jamie  Zawinski &lt;jwz@jwz.org&gt;<a name="line.24"></a>
<span class="sourceLineNo">025</span> * @author rwinston &lt;rwinston@apache.org&gt;<a name="line.25"></a>
<span class="sourceLineNo">026</span> */<a name="line.26"></a>
<span class="sourceLineNo">027</span>public class Article implements Threadable {<a name="line.27"></a>
<span class="sourceLineNo">028</span>    private long articleNumber;<a name="line.28"></a>
<span class="sourceLineNo">029</span>    private String subject;<a name="line.29"></a>
<span class="sourceLineNo">030</span>    private String date;<a name="line.30"></a>
<span class="sourceLineNo">031</span>    private String articleId;<a name="line.31"></a>
<span class="sourceLineNo">032</span>    private String simplifiedSubject;<a name="line.32"></a>
<span class="sourceLineNo">033</span>    private String from;<a name="line.33"></a>
<span class="sourceLineNo">034</span>    private ArrayList&lt;String&gt; references;<a name="line.34"></a>
<span class="sourceLineNo">035</span>    private boolean isReply = false;<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span>    public Article kid, next;<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span>    public Article() {<a name="line.39"></a>
<span class="sourceLineNo">040</span>        articleNumber = -1; // isDummy<a name="line.40"></a>
<span class="sourceLineNo">041</span>    }<a name="line.41"></a>
<span class="sourceLineNo">042</span><a name="line.42"></a>
<span class="sourceLineNo">043</span>    /**<a name="line.43"></a>
<span class="sourceLineNo">044</span>     * Adds a message-id to the list of messages that this message references (i.e. replies to)<a name="line.44"></a>
<span class="sourceLineNo">045</span>     * @param msgId<a name="line.45"></a>
<span class="sourceLineNo">046</span>     */<a name="line.46"></a>
<span class="sourceLineNo">047</span>    public void addReference(String msgId) {<a name="line.47"></a>
<span class="sourceLineNo">048</span>        if (msgId == null || msgId.length() == 0) {<a name="line.48"></a>
<span class="sourceLineNo">049</span>            return;<a name="line.49"></a>
<span class="sourceLineNo">050</span>        }<a name="line.50"></a>
<span class="sourceLineNo">051</span>        if (references == null) {<a name="line.51"></a>
<span class="sourceLineNo">052</span>            references = new ArrayList&lt;String&gt;();<a name="line.52"></a>
<span class="sourceLineNo">053</span>        }<a name="line.53"></a>
<span class="sourceLineNo">054</span>        isReply = true;<a name="line.54"></a>
<span class="sourceLineNo">055</span>        for(String s : msgId.split(" ")) {<a name="line.55"></a>
<span class="sourceLineNo">056</span>            references.add(s);<a name="line.56"></a>
<span class="sourceLineNo">057</span>        }<a name="line.57"></a>
<span class="sourceLineNo">058</span>    }<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span>    /**<a name="line.60"></a>
<span class="sourceLineNo">061</span>     * Returns the MessageId references as an array of Strings<a name="line.61"></a>
<span class="sourceLineNo">062</span>     * @return an array of message-ids<a name="line.62"></a>
<span class="sourceLineNo">063</span>     */<a name="line.63"></a>
<span class="sourceLineNo">064</span>    public String[] getReferences() {<a name="line.64"></a>
<span class="sourceLineNo">065</span>        if (references == null) {<a name="line.65"></a>
<span class="sourceLineNo">066</span>            return new String[0];<a name="line.66"></a>
<span class="sourceLineNo">067</span>        }<a name="line.67"></a>
<span class="sourceLineNo">068</span>        return references.toArray(new String[references.size()]);<a name="line.68"></a>
<span class="sourceLineNo">069</span>    }<a name="line.69"></a>
<span class="sourceLineNo">070</span><a name="line.70"></a>
<span class="sourceLineNo">071</span>    /**<a name="line.71"></a>
<span class="sourceLineNo">072</span>     * Attempts to parse the subject line for some typical reply signatures, and strip them out<a name="line.72"></a>
<span class="sourceLineNo">073</span>     *<a name="line.73"></a>
<span class="sourceLineNo">074</span>     */<a name="line.74"></a>
<span class="sourceLineNo">075</span>    private void simplifySubject() {<a name="line.75"></a>
<span class="sourceLineNo">076</span>            int start = 0;<a name="line.76"></a>
<span class="sourceLineNo">077</span>            String subject = getSubject();<a name="line.77"></a>
<span class="sourceLineNo">078</span>            int len = subject.length();<a name="line.78"></a>
<span class="sourceLineNo">079</span><a name="line.79"></a>
<span class="sourceLineNo">080</span>            boolean done = false;<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>            while (!done) {<a name="line.82"></a>
<span class="sourceLineNo">083</span>                done = true;<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>                // skip whitespace<a name="line.85"></a>
<span class="sourceLineNo">086</span>                // "Re: " breaks this<a name="line.86"></a>
<span class="sourceLineNo">087</span>                while (start &lt; len &amp;&amp; subject.charAt(start) == ' ') {<a name="line.87"></a>
<span class="sourceLineNo">088</span>                    start++;<a name="line.88"></a>
<span class="sourceLineNo">089</span>                }<a name="line.89"></a>
<span class="sourceLineNo">090</span><a name="line.90"></a>
<span class="sourceLineNo">091</span>                if (start &lt; (len - 2)<a name="line.91"></a>
<span class="sourceLineNo">092</span>                    &amp;&amp; (subject.charAt(start) == 'r' || subject.charAt(start) == 'R')<a name="line.92"></a>
<span class="sourceLineNo">093</span>                    &amp;&amp; (subject.charAt(start + 1) == 'e' || subject.charAt(start + 1) == 'E')) {<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>                    if (subject.charAt(start + 2) == ':') {<a name="line.95"></a>
<span class="sourceLineNo">096</span>                        start += 3; // Skip "Re:"<a name="line.96"></a>
<span class="sourceLineNo">097</span>                        done = false;<a name="line.97"></a>
<span class="sourceLineNo">098</span>                    } else if (<a name="line.98"></a>
<span class="sourceLineNo">099</span>                        start &lt; (len - 2)<a name="line.99"></a>
<span class="sourceLineNo">100</span>                        &amp;&amp;<a name="line.100"></a>
<span class="sourceLineNo">101</span>                        (subject.charAt(start + 2) == '[' || subject.charAt(start + 2) == '(')) {<a name="line.101"></a>
<span class="sourceLineNo">102</span><a name="line.102"></a>
<span class="sourceLineNo">103</span>                        int i = start + 3;<a name="line.103"></a>
<span class="sourceLineNo">104</span><a name="line.104"></a>
<span class="sourceLineNo">105</span>                        while (i &lt; len &amp;&amp; subject.charAt(i) &gt;= '0' &amp;&amp; subject.charAt(i) &lt;= '9') {<a name="line.105"></a>
<span class="sourceLineNo">106</span>                            i++;<a name="line.106"></a>
<span class="sourceLineNo">107</span>                        }<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span>                        if (i &lt; (len - 1)<a name="line.109"></a>
<span class="sourceLineNo">110</span>                            &amp;&amp; (subject.charAt(i) == ']' || subject.charAt(i) == ')')<a name="line.110"></a>
<span class="sourceLineNo">111</span>                            &amp;&amp; subject.charAt(i + 1) == ':')<a name="line.111"></a>
<span class="sourceLineNo">112</span>                        {<a name="line.112"></a>
<span class="sourceLineNo">113</span>                            start = i + 2;<a name="line.113"></a>
<span class="sourceLineNo">114</span>                            done = false;<a name="line.114"></a>
<span class="sourceLineNo">115</span>                        }<a name="line.115"></a>
<span class="sourceLineNo">116</span>                    }<a name="line.116"></a>
<span class="sourceLineNo">117</span>                }<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span>                if ("(no subject)".equals(simplifiedSubject)) {<a name="line.119"></a>
<span class="sourceLineNo">120</span>                    simplifiedSubject = "";<a name="line.120"></a>
<span class="sourceLineNo">121</span>                }<a name="line.121"></a>
<span class="sourceLineNo">122</span><a name="line.122"></a>
<span class="sourceLineNo">123</span>                int end = len;<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span>                while (end &gt; start &amp;&amp; subject.charAt(end - 1) &lt; ' ') {<a name="line.125"></a>
<span class="sourceLineNo">126</span>                    end--;<a name="line.126"></a>
<span class="sourceLineNo">127</span>                }<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span>                if (start == 0 &amp;&amp; end == len) {<a name="line.129"></a>
<span class="sourceLineNo">130</span>                    simplifiedSubject = subject;<a name="line.130"></a>
<span class="sourceLineNo">131</span>                } else {<a name="line.131"></a>
<span class="sourceLineNo">132</span>                    simplifiedSubject = subject.substring(start, end);<a name="line.132"></a>
<span class="sourceLineNo">133</span>                }<a name="line.133"></a>
<span class="sourceLineNo">134</span>            }<a name="line.134"></a>
<span class="sourceLineNo">135</span>        }<a name="line.135"></a>
<span class="sourceLineNo">136</span><a name="line.136"></a>
<span class="sourceLineNo">137</span>    /**<a name="line.137"></a>
<span class="sourceLineNo">138</span>     * Recursive method that traverses a pre-threaded graph (or tree)<a name="line.138"></a>
<span class="sourceLineNo">139</span>     * of connected Article objects and prints them out.<a name="line.139"></a>
<span class="sourceLineNo">140</span>     * @param article the root of the article 'tree'<a name="line.140"></a>
<span class="sourceLineNo">141</span>     * @param depth the current tree depth<a name="line.141"></a>
<span class="sourceLineNo">142</span>     */<a name="line.142"></a>
<span class="sourceLineNo">143</span>    public static void printThread(Article article, int depth) {<a name="line.143"></a>
<span class="sourceLineNo">144</span>            for (int i = 0; i &lt; depth; ++i) {<a name="line.144"></a>
<span class="sourceLineNo">145</span>                System.out.print("==&gt;");<a name="line.145"></a>
<span class="sourceLineNo">146</span>            }<a name="line.146"></a>
<span class="sourceLineNo">147</span>            System.out.println(article.getSubject() + "\t" + article.getFrom()+"\t"+article.getArticleId());<a name="line.147"></a>
<span class="sourceLineNo">148</span>            if (article.kid != null) {<a name="line.148"></a>
<span class="sourceLineNo">149</span>                printThread(article.kid, depth + 1);<a name="line.149"></a>
<span class="sourceLineNo">150</span>            }<a name="line.150"></a>
<span class="sourceLineNo">151</span>            if (article.next != null) {<a name="line.151"></a>
<span class="sourceLineNo">152</span>                printThread(article.next, depth);<a name="line.152"></a>
<span class="sourceLineNo">153</span>            }<a name="line.153"></a>
<span class="sourceLineNo">154</span>    }<a name="line.154"></a>
<span class="sourceLineNo">155</span><a name="line.155"></a>
<span class="sourceLineNo">156</span>    public String getArticleId() {<a name="line.156"></a>
<span class="sourceLineNo">157</span>        return articleId;<a name="line.157"></a>
<span class="sourceLineNo">158</span>    }<a name="line.158"></a>
<span class="sourceLineNo">159</span><a name="line.159"></a>
<span class="sourceLineNo">160</span>    public long getArticleNumberLong() {<a name="line.160"></a>
<span class="sourceLineNo">161</span>        return articleNumber;<a name="line.161"></a>
<span class="sourceLineNo">162</span>    }<a name="line.162"></a>
<span class="sourceLineNo">163</span><a name="line.163"></a>
<span class="sourceLineNo">164</span>    public String getDate() {<a name="line.164"></a>
<span class="sourceLineNo">165</span>        return date;<a name="line.165"></a>
<span class="sourceLineNo">166</span>    }<a name="line.166"></a>
<span class="sourceLineNo">167</span><a name="line.167"></a>
<span class="sourceLineNo">168</span>    public String getFrom() {<a name="line.168"></a>
<span class="sourceLineNo">169</span>        return from;<a name="line.169"></a>
<span class="sourceLineNo">170</span>    }<a name="line.170"></a>
<span class="sourceLineNo">171</span><a name="line.171"></a>
<span class="sourceLineNo">172</span>    public String getSubject() {<a name="line.172"></a>
<span class="sourceLineNo">173</span>        return subject;<a name="line.173"></a>
<span class="sourceLineNo">174</span>    }<a name="line.174"></a>
<span class="sourceLineNo">175</span><a name="line.175"></a>
<span class="sourceLineNo">176</span>    public void setArticleId(String string) {<a name="line.176"></a>
<span class="sourceLineNo">177</span>        articleId = string;<a name="line.177"></a>
<span class="sourceLineNo">178</span>    }<a name="line.178"></a>
<span class="sourceLineNo">179</span><a name="line.179"></a>
<span class="sourceLineNo">180</span>    public void setArticleNumber(long l) {<a name="line.180"></a>
<span class="sourceLineNo">181</span>        articleNumber = l;<a name="line.181"></a>
<span class="sourceLineNo">182</span>    }<a name="line.182"></a>
<span class="sourceLineNo">183</span><a name="line.183"></a>
<span class="sourceLineNo">184</span>    public void setDate(String string) {<a name="line.184"></a>
<span class="sourceLineNo">185</span>        date = string;<a name="line.185"></a>
<span class="sourceLineNo">186</span>    }<a name="line.186"></a>
<span class="sourceLineNo">187</span><a name="line.187"></a>
<span class="sourceLineNo">188</span>    public void setFrom(String string) {<a name="line.188"></a>
<span class="sourceLineNo">189</span>        from = string;<a name="line.189"></a>
<span class="sourceLineNo">190</span>    }<a name="line.190"></a>
<span class="sourceLineNo">191</span><a name="line.191"></a>
<span class="sourceLineNo">192</span>    public void setSubject(String string) {<a name="line.192"></a>
<span class="sourceLineNo">193</span>        subject = string;<a name="line.193"></a>
<span class="sourceLineNo">194</span>    }<a name="line.194"></a>
<span class="sourceLineNo">195</span><a name="line.195"></a>
<span class="sourceLineNo">196</span><a name="line.196"></a>
<span class="sourceLineNo">197</span>//    @Override<a name="line.197"></a>
<span class="sourceLineNo">198</span>    public boolean isDummy() {<a name="line.198"></a>
<span class="sourceLineNo">199</span>        return (articleNumber == -1);<a name="line.199"></a>
<span class="sourceLineNo">200</span>    }<a name="line.200"></a>
<span class="sourceLineNo">201</span><a name="line.201"></a>
<span class="sourceLineNo">202</span>//    @Override<a name="line.202"></a>
<span class="sourceLineNo">203</span>    public String messageThreadId() {<a name="line.203"></a>
<span class="sourceLineNo">204</span>        return articleId;<a name="line.204"></a>
<span class="sourceLineNo">205</span>    }<a name="line.205"></a>
<span class="sourceLineNo">206</span><a name="line.206"></a>
<span class="sourceLineNo">207</span>//    @Override<a name="line.207"></a>
<span class="sourceLineNo">208</span>    public String[] messageThreadReferences() {<a name="line.208"></a>
<span class="sourceLineNo">209</span>        return getReferences();<a name="line.209"></a>
<span class="sourceLineNo">210</span>    }<a name="line.210"></a>
<span class="sourceLineNo">211</span><a name="line.211"></a>
<span class="sourceLineNo">212</span>//    @Override<a name="line.212"></a>
<span class="sourceLineNo">213</span>    public String simplifiedSubject() {<a name="line.213"></a>
<span class="sourceLineNo">214</span>        if(simplifiedSubject == null) {<a name="line.214"></a>
<span class="sourceLineNo">215</span>            simplifySubject();<a name="line.215"></a>
<span class="sourceLineNo">216</span>        }<a name="line.216"></a>
<span class="sourceLineNo">217</span>        return simplifiedSubject;<a name="line.217"></a>
<span class="sourceLineNo">218</span>    }<a name="line.218"></a>
<span class="sourceLineNo">219</span><a name="line.219"></a>
<span class="sourceLineNo">220</span><a name="line.220"></a>
<span class="sourceLineNo">221</span>//    @Override<a name="line.221"></a>
<span class="sourceLineNo">222</span>    public boolean subjectIsReply() {<a name="line.222"></a>
<span class="sourceLineNo">223</span>        return isReply;<a name="line.223"></a>
<span class="sourceLineNo">224</span>    }<a name="line.224"></a>
<span class="sourceLineNo">225</span><a name="line.225"></a>
<span class="sourceLineNo">226</span><a name="line.226"></a>
<span class="sourceLineNo">227</span>//    @Override<a name="line.227"></a>
<span class="sourceLineNo">228</span>    public void setChild(Threadable child) {<a name="line.228"></a>
<span class="sourceLineNo">229</span>        this.kid = (Article) child;<a name="line.229"></a>
<span class="sourceLineNo">230</span>        flushSubjectCache();<a name="line.230"></a>
<span class="sourceLineNo">231</span>    }<a name="line.231"></a>
<span class="sourceLineNo">232</span><a name="line.232"></a>
<span class="sourceLineNo">233</span>    private void flushSubjectCache() {<a name="line.233"></a>
<span class="sourceLineNo">234</span>        simplifiedSubject = null;<a name="line.234"></a>
<span class="sourceLineNo">235</span>    }<a name="line.235"></a>
<span class="sourceLineNo">236</span><a name="line.236"></a>
<span class="sourceLineNo">237</span><a name="line.237"></a>
<span class="sourceLineNo">238</span>//    @Override<a name="line.238"></a>
<span class="sourceLineNo">239</span>    public void setNext(Threadable next) {<a name="line.239"></a>
<span class="sourceLineNo">240</span>        this.next = (Article)next;<a name="line.240"></a>
<span class="sourceLineNo">241</span>        flushSubjectCache();<a name="line.241"></a>
<span class="sourceLineNo">242</span>    }<a name="line.242"></a>
<span class="sourceLineNo">243</span><a name="line.243"></a>
<span class="sourceLineNo">244</span><a name="line.244"></a>
<span class="sourceLineNo">245</span>//    @Override<a name="line.245"></a>
<span class="sourceLineNo">246</span>    public Threadable makeDummy() {<a name="line.246"></a>
<span class="sourceLineNo">247</span>        return new Article();<a name="line.247"></a>
<span class="sourceLineNo">248</span>    }<a name="line.248"></a>
<span class="sourceLineNo">249</span><a name="line.249"></a>
<span class="sourceLineNo">250</span>    @Override<a name="line.250"></a>
<span class="sourceLineNo">251</span>    public String toString(){ // Useful for Eclipse debugging<a name="line.251"></a>
<span class="sourceLineNo">252</span>        return articleNumber + " " +articleId + " " + subject;<a name="line.252"></a>
<span class="sourceLineNo">253</span>    }<a name="line.253"></a>
<span class="sourceLineNo">254</span><a name="line.254"></a>
<span class="sourceLineNo">255</span>    // DEPRECATED METHODS - for API compatibility only - DO NOT USE<a name="line.255"></a>
<span class="sourceLineNo">256</span><a name="line.256"></a>
<span class="sourceLineNo">257</span>    @Deprecated<a name="line.257"></a>
<span class="sourceLineNo">258</span>    public int getArticleNumber() {<a name="line.258"></a>
<span class="sourceLineNo">259</span>        return (int) articleNumber;<a name="line.259"></a>
<span class="sourceLineNo">260</span>    }<a name="line.260"></a>
<span class="sourceLineNo">261</span><a name="line.261"></a>
<span class="sourceLineNo">262</span>    @Deprecated<a name="line.262"></a>
<span class="sourceLineNo">263</span>    public void setArticleNumber(int a) {<a name="line.263"></a>
<span class="sourceLineNo">264</span>        articleNumber = a;<a name="line.264"></a>
<span class="sourceLineNo">265</span>    }<a name="line.265"></a>
<span class="sourceLineNo">266</span>    @Deprecated<a name="line.266"></a>
<span class="sourceLineNo">267</span><a name="line.267"></a>
<span class="sourceLineNo">268</span>    public void addHeaderField(String name, String val) {<a name="line.268"></a>
<span class="sourceLineNo">269</span>    }<a name="line.269"></a>
<span class="sourceLineNo">270</span><a name="line.270"></a>
<span class="sourceLineNo">271</span>}<a name="line.271"></a>




























































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